nixos/tests: add kbd-update-search-paths-patch

nixos/tests/all-tests.nix

···
   k3s = handleTest ./k3s.nix {};
   kafka = handleTest ./kafka.nix {};
   kbd-setfont-decompress = handleTest ./kbd-setfont-decompress.nix {};
+  kbd-update-search-paths-patch = handleTest ./kbd-update-search-paths-patch.nix {};
   kea = handleTest ./kea.nix {};
   keepalived = handleTest ./keepalived.nix {};
   keepassxc = handleTest ./keepassxc.nix {};

nixos/tests/kbd-update-search-paths-patch.nix

···
+import ./make-test-python.nix ({ pkgs, ... }: {
+  name = "kbd-update-search-paths-patch";
+
+  machine = { pkgs, options, ... }: {
+    console = {
+      packages = options.console.packages.default ++ [ pkgs.terminus_font ];
+    };
+  };
+
+  testScript = ''
+    command = "${pkgs.kbd}/bin/setfont ter-112n 2>&1"
+    (status, out) = machine.execute(command)
+    pattern = re.compile(r".*Unable to find file:.*")
+    match = pattern.match(out)
+    if match:
+        raise Exception("command `{}` failed".format(command))
+  '';
+})